package com.atguigu.yygh.cmn.service.impl;

import com.alibaba.excel.EasyExcel;
import com.atguigu.yygh.cmn.listener.DictListenner;
import com.atguigu.yygh.cmn.mapper.DictMapper;
import com.atguigu.yygh.cmn.service.DictService;
import com.atguigu.yygh.model.cmn.Dict;
import com.atguigu.yygh.vo.cmn.DictEeVo;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author xiaowei
 * @description:
 * @create 2021-11-22-20:28
 */

@Service
public class DictServiceImpl extends ServiceImpl<DictMapper, Dict> implements DictService {


//    根据数据id查询子数据列表
    @Override
    public List<Dict> findChildData(Long id) {
        QueryWrapper<Dict> wrapper = new QueryWrapper<>();
        wrapper.eq("parent_id",id);
        List<Dict> dicts = baseMapper.selectList(wrapper);
//        向list集合每个dict对象中设置hasChildren
        for(Dict dict:dicts){
            Long dictId = dict.getId();
            boolean children = this.isChildren(dictId);
            dict.setHasChildren(children);
        }
        return dicts;
    }
    //导出数据字典接口
    @Override
    public void exportDictData(HttpServletResponse response){
//        设置下载信息
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
// 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
        String fileName = "dict";
        response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
//          查询数据库
        List<Dict> dictList = baseMapper.selectList(null);
//            Dict --DictEeVo
        List<DictEeVo> dictVoList = new ArrayList<>();
        for (Dict dict : dictList) {
            DictEeVo dictEeVo = new DictEeVo();
//                dictVo.setId(dict.getId());
            BeanUtils.copyProperties(dict, dictEeVo);
            dictVoList.add(dictEeVo);
//            调用方法进行写操作
            try {
                EasyExcel.write(response.getOutputStream(), DictEeVo.class).sheet("dict").doWrite(dictVoList);
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }
//导入数据字典
    @Override
    public void importDictData(MultipartFile file) {
        try {
            EasyExcel.read(file.getInputStream(),DictEeVo.class,new DictListenner(baseMapper)).sheet().doRead();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public String getDictName(String dictCode, String value) {
//        如果dictCode为空，直接根据value查询
        if(StringUtils.isEmpty(dictCode)){
            QueryWrapper<Dict> wrapper = new QueryWrapper<>();
            wrapper.eq("value",value);
            Dict dict = baseMapper.selectOne(wrapper);
            return dict.getName();
        }else{
//            根据dictcode查询dict对象，得到dict的id值
            QueryWrapper<Dict> wrapper = new QueryWrapper<>();
            wrapper.eq("dict_code",dictCode);
            Dict codeDict = baseMapper.selectOne(wrapper);
            Long parent_id = codeDict.getId();
//            根据parent_id和value值进行查询
            Dict finalDict = baseMapper.selectOne(new QueryWrapper<Dict>()
                    .eq("parent_id",parent_id)
            .eq("value",value));
            return finalDict.getName();
        }
    }
    //根据dictCode获取下级节点
    @Override
    public List<Dict> findByDictCode(String dictCode) {
//        根据dictcode获取对应的id
        Dict dict = this.getDictByDictCode(dictCode);
//        根据id获取下层子节点
        List<Dict> childData = this.findChildData(dict.getId());
        return childData;
    }
    private Dict getDictByDictCode(String dictCode) {
        QueryWrapper<Dict> wrapper = new QueryWrapper<>();
        wrapper.eq("dict_code",dictCode);
        Dict codeDict = baseMapper.selectOne(wrapper);
        return codeDict;
    }

    //    判断id下面是否有子节点
    private boolean isChildren(Long id){
        QueryWrapper<Dict> wrapper = new QueryWrapper<>();
        wrapper.eq("parent_id",id);
        Integer count = baseMapper.selectCount(wrapper);
        return count>0;
    }
}

